Makes use of Digital growth valve to precisely Management the circulation of R290 refrigerant in the evaporator in addition to a four-way valve to divert the refrigerant circulation for that defrost Procedure The Haier Air to Water Heat Pump vary uses cost-free renewable Electricity from the outside air for a https://kingbookmark.com/story20535736/what-does-r290-air-source-heat-pump-mean